I'm trying to build a custom potentiometer by cutting a [nichrome resistance strip] to a U-shaped sheet (approximately 6cm * 15cm) and attaching a triangular metal part to check the resistance.
The triangular metal part will be attached to A0, and each end of the nichrome resistance strip will be attached to GND and 5V. the triangle is moved along the blue curve to change resistance sensed by A0.
I want the arduino to detect the triangle's movement based on the changing value of A0.
The problem is, I cannot decide on which nichrome resistance strip that I need to buy, because I don't know what the units which stand for resistivity exactly mean.
for example, in the given phrase
"Alloy Specific Resistance (at 20° Cµ Ω -m): 1.45+-0.07"
Could somebody please tell me what this means?
The product that I'm currently looking forward to buying is in the link below.